Michael hogarty



(No Model.)

\ M. HOGARTY.

RULE.

Patented Dec. 22, 1891.

mit

UNITED STATES PATENT OEEicE.

MICHAEL HOGARTY, OFFSALISBURY, CONNECTICUT.

RULE.

SPECIFICATION forming part of Letters Patent No. 465,664, dated December 22, 1891.

Application filed June 27, 1891. Serial No. 397,709. (No model.)

To all whom t may concern:

Be it known that I, MICHAEL I-Ioeanrr, a citizen of the United States of America, residing at Salisbury, in the county of Litchfield and State of Connecticut, have invented certain new and useful Improvements in Rules, of which the following is a specification, reference being had thereinto the accompany- ,ing drawings.

This invention relates to certain new and useful improvements in rules, having reference more especially to the class of composite folding rules; and it has for its object the provision of means whereby there shall be a great saving of material and the strength of the parts greatly improved.

To these ends the invention comprises a rule whose main or body portion is made of wood,and metallic side plates between which and said wood body the hinge-plates are secured, the latter being covered or concealed by ivory strips secured to the wood body, substantially as hereinafter fully set forth, and particularly pointed out in the claims.

In the accompanying drawings, Figures l and 2 are opposite plan views of my improved rule. Fig. is a longitudinal sectional view on the line Fig. l. Fig. e is a cross-seo tional View on the line y y, Fig. l. Fig. 5 is a view of one of the sections.

As heretofore constructed, the objection to rules having ivory bodies has been, first, that 4the saine was very expensive; second, thatin many instances rivet-holes were made with difculty, and, third, that ivory if subjected to a sudden knock or fall would break at the point of location of the rivets. Another object-ion was to the time and labor involved in curving or tenoning the ends of the ivory sections. By my invention itis sought to attain all the advantages of a solid ivory rule without entailing any of the objections thereto,` and also to add additional strength to the parts and render a great saving in time andv cost of production.

Referring to the drawings, A designates what is commonly called a foot-rule, com posed of two main sections a., which are each divided into two subsections ac, said sections being hinged or pivotally connected together. Each section is composed of a central bodypiece Z2, of wood, and parallel longitudinal side strips b', of metal. The inner ends of the longitudinal strips bof the end section a have apertured ears b2 formed therewith, and through the apertures of said ears is passed a pin or rivet b3, which is also passed through apertured ears b4 of two short. hinge-plates b5, and also through a central sleeve h6, inserted between said ears b4, the whole constituting a hinge C. The hinge-plates b5 are greatly reduced in width and are designed to fit in grooves or recesses in the wood or body portion b of the second section a? and held sandwiched between the body and the longitudinal side strips d by rivets' d', which pass through said strips and body. The ends of the wood body b are curved to fit the hinges.

D designates the strip of ivory for each section. rlhe same is rigidly secured to the wood body b by rivets D and is held between and fiush with the protruding edges ofthe side strips b. rlhe ends ofthe strips adjacent the hinge C are perfectly straight and made to fit flush against the hinge,concealing entirely from view the hinge-plates. All curving or reducing of the ivory strips is thus avoided,

and the strength of the latter at their ends is not impaired by having tenons and the like.

The hinge E between the sections a consists of a central circular plate e, having a flange e and two parallel hinge-plates e2, between the sections a2, while the plates e5 are similarly secured to the other section. The outer ends of these plates e2 e5 are preferably provided each with a slight curve e, and the ivory strips are correspondingly lcurved to conform thereto.

The rule is shown as having an extensible plate F, provided with a head f; but as this feature forms no part of my invention further description thereof is unnecessary.

From the foregoing it will be seen that I have produced a rule that possesses all of the advantages of a solid ivory rule, yet is much cheaper and far more lasting and durable, and one that presents a neat appearance, the hinge-plates of the intermediate sections be ing concealed by the ivory strips.

ico

5 side edges of said body and strips, as set forth.

2. A rule having its sections composed ofa wood body, longitudinal metallic plates, the hinges between said sections having their plates sandwiched between said body and 1o plates, and the strips or plates covering said body and hinge-plates and located between said longitudinal plates, as set forth.

3. The herein-described improved rule,con sisting of the sections having each a body of wood, longitudinal metallic plates secured to the side edges of such body, the hinges havin g their plates sandwiched between saidbody and metallic plates, and the ivory strips secured to the opposite sides of said body and located between said longitudinal plates and having flush ends covering said hinge-plates, substantially as set forth.

In testimony whereof I aflx my signature in presence of two witnesses.

MICHAEL HOGARTY. Witnesses:

H. J. BIssELL, E. E. BARTRAM. 

